The U.S. government is moving to dismiss the Standing Rock Sioux Tribe’s lawsuit seeking to block operations of the Dakota Access Pipeline. According to court documents, the U.S. Army Corps of Engineers argues the tribe’s claims are too vague and that the court lacks the authority to enforce the requested actions. Fourteen Republican-led states, including North Dakota, support this position. The tribe contends that Energy Transfer LP is operating without a valid easement, violating environmental laws.